Difference between pages "OLE Compound File" and "Libewf"

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(OLE Compound File)
 
 
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The '''OLE Compound File (OLECF)''' is used in other file formats as its underlying container file.
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{{Infobox_Software |
It allows data to be stored in multiple streams.  
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  name = libewf |
 +
  maintainer = [[Joachim Metz]], [[David Loveall]] |
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  os = [[Linux]], [[FreeBSD]], [[NetBSD]], [[OpenBSD]], [[Mac OS X]], [[Windows]] |
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  genre = {{Disk imaging}} |
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  license = {{LGPL}} |
 +
  website = [http://code.google.com/p/libewf/ code.google.com/p/libewf/] |
 +
}}
  
The OLECF is also known as:
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'''Libewf''' is a library to access the [[Encase image file format|Expert Witness Compression Format (EWF)]].
* OLE2 file
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* Compound Binary File (current name used by [[Microsoft]])
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* Compound Document File (name used by [[OpenOffice]])
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== MIME types ==
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== Features ==  
 +
Read or write supported EWF formats:
 +
* [[SMART]] .s01 (EWF-S01)
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* [[EnCase]] .E01 (EWF-E01) and .Ex01 (EWF2-Ex01)
  
Because the OLECF by itself is just a container it does not use a mime type.
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Read-only supported EWF formats:
A mime type assigned to an OLECF refers to its content.
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* Logical Evidence File (LEF) .L01 (EWF-L01) and .Lx01 (EWF2-Lx01)
  
== File signature ==
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Other features:
 +
* empty-block compression
 +
* read/write access using delta (or shadow) files
 +
* write resume
  
The OLECF has the following file signature:
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== Tools ==
hexadecimal: d0 cf 11 e0 a1 b1 1a e1
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The '''libewf''' package contains the following tools:
 +
* '''ewfacquire''', which writes storage media data from devices and files to EWF files.
 +
* '''ewfacquirestream''', which writes data from stdin to EWF files.
 +
* '''ewfdebug'''; experimental tool does nothing at the moment.
 +
* '''ewfexport''', which exports storage media data in EWF files to (split) RAW format or a specific version of EWF files.
 +
* '''ewfinfo''', which shows the metadata in EWF files.
 +
* '''ewfmount''', which FUSE mounts EWF files.
 +
* '''ewfverify''', which verifies the storage media data in EWF files.
  
The OLECF has no distinct footer.
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The '''libewf''' package also contains the following bindings:
 +
* '''ewf.net''', bindings for .Net
 +
* '''pyewf''', bindings for Python contributed by [[David Collett]] in 2008
  
== Contents ==
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=== Contributions ===
 +
Tools that have been contributed to the project are provided as separate tools on the sourceforge libewf project site. These are:
 +
* '''mount_ewf.py''', which allows the storage media data in a EWF files to be mounted, contributed by [[David Loveall]] in 2007.
 +
* '''libewf-java''', Java (JNA) bindings were contributed by [[Bradley Schatz]] in 2009.
 +
* '''delphi imdisk proxy''', Borland Delphi imdisk proxy, as an alternative to mount_ewf.py for Windows, contributed by [[Brendan Berney]] in 2010.
 +
* '''jlibewf''', native Java EWF reader contributed by [[Bruce Allen]] in 2010.
  
The OLECF uses a FAT like file system to define the streams through a directory and the blocks that are assigned to the stream using multiple allocation tables.
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A menu based interface for ewfacquirestream called pyEWF, contributed by [[Dennis Schreiber]], was originally also available on the uitwisselplatform project site. However this is currently no longer maintained and was not moved to the sourceforge project size. The uitwisselplatform no longer exists. The name pyewf was reused for the libewf Python bindings created by [[David Collett]] which is now included in the libewf package.
  
The OLECF is used to store:
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=== Examples ===
* [[Microsoft Office]] 97-2003 documents:
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** [[Word Document (DOC)]]
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** [[Excel Spreadsheet (XLS)]]
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** [[Powerpoint Presentation (PPT)]]
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* [[Thumbs.db]]
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== See also==
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Imaging a device on a Unix-based system:
 +
<pre>
 +
ewfacquire /dev/sda
 +
</pre>
  
[[Media:Compdocfileformat.pdf|Microsoft Compound Document File Format]] (This is actually the OpenOffice specification)
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Imaging a device on a Windows system:
 +
<pre>
 +
ewfacquire \\.\PhysicalDrive0
 +
</pre>
  
[http://download.microsoft.com/download/0/B/E/0BE8BDD7-E5E8-422A-ABFD-4342ED7AD886/WindowsCompoundBinaryFileFormatSpecification.pdf Compound Binary File Specification by Microsoft]
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Converting a split RAW into an EWF image
 +
<pre>
 +
ewfacquire split.raw.???
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</pre>
  
Be warned this file contains at least one error: the directory entry name length is a size in bytes not in characters.
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or
  
[[Category:File Formats]]
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<pre>
 +
cat split.raw.??? | ewfacquirestream
 +
</pre>
 +
 
 +
Converting an optical disc (split) RAW into an EWF image (libewf 20110109 or later)
 +
<pre>
 +
ewfacquire -T optical.cue optical.iso
 +
</pre>
 +
 
 +
Converting an EWF into another EWF format or a (split) RAW image
 +
<pre>
 +
ewfexport image.E01
 +
</pre>
 +
 
 +
Exporting files from a logical image (L01)
 +
<pre>
 +
ewfexport image.L01
 +
</pre>
 +
 
 +
FUSE mounting an EWF image (libewf 20110828 or later)
 +
<pre>
 +
ewfmount image.E01 mount_point
 +
</pre>
 +
 
 +
FUSE mounting a logical image (L01) (libewf 20111016 or later)
 +
<pre>
 +
ewfmount -f files image.L01 mount_point
 +
</pre>
 +
 
 +
== History ==
 +
 
 +
Libewf was created by [[Joachim Metz]] in 2006, while working for [http://en.hoffmannbv.nl/ Hoffmann Investigations].
 +
 
 +
Libewf is a rewrite of earlier work on the EnCase 4 file format by [[Michael Cohen]] part of [[PyFlag]] and the [[:File:ASR Data's Expert Witness Compression Format.pdf|Expert Witness Compression Format]] Specification by [[Andrew Rosen]]. It has been updated to read and write EnCase version 1 to 7 .E01 files, EnCase 5 to 7 .L01 files, EnCase 7 .Ex01 and .Lx01 files and SMART .s01 files. Libewf has initiated an Extended EWF (EWF-X) specifications to bypass limitations on the format imposed by the EnCase .E01 format.
 +
 
 +
In 2007 [[David Loveall]] contributed mount_ewf.py to the libewf project. This application allows a [[fuse]] based mount of the storage media data in the EWF files to be mounted. Due to repeated issues with Python and the fuse Python-bindings on [[Mac OS X]] part of the functionality of these scripts has been rewritten into '''ewfmount'''.
 +
 
 +
== External Links ==
 +
 
 +
* [http://code.google.com/p/libewf/ Project site]
 +
* [http://libewf.sourceforge.net Old project site]

Revision as of 01:03, 30 July 2012

libewf
Maintainer: Joachim Metz, David Loveall
OS: Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, Windows
Genre: Disk imaging
License: LGPL
Website: code.google.com/p/libewf/

Libewf is a library to access the Expert Witness Compression Format (EWF).

Features

Read or write supported EWF formats:

  • SMART .s01 (EWF-S01)
  • EnCase .E01 (EWF-E01) and .Ex01 (EWF2-Ex01)

Read-only supported EWF formats:

  • Logical Evidence File (LEF) .L01 (EWF-L01) and .Lx01 (EWF2-Lx01)

Other features:

  • empty-block compression
  • read/write access using delta (or shadow) files
  • write resume

Tools

The libewf package contains the following tools:

  • ewfacquire, which writes storage media data from devices and files to EWF files.
  • ewfacquirestream, which writes data from stdin to EWF files.
  • ewfdebug; experimental tool does nothing at the moment.
  • ewfexport, which exports storage media data in EWF files to (split) RAW format or a specific version of EWF files.
  • ewfinfo, which shows the metadata in EWF files.
  • ewfmount, which FUSE mounts EWF files.
  • ewfverify, which verifies the storage media data in EWF files.

The libewf package also contains the following bindings:

  • ewf.net, bindings for .Net
  • pyewf, bindings for Python contributed by David Collett in 2008

Contributions

Tools that have been contributed to the project are provided as separate tools on the sourceforge libewf project site. These are:

  • mount_ewf.py, which allows the storage media data in a EWF files to be mounted, contributed by David Loveall in 2007.
  • libewf-java, Java (JNA) bindings were contributed by Bradley Schatz in 2009.
  • delphi imdisk proxy, Borland Delphi imdisk proxy, as an alternative to mount_ewf.py for Windows, contributed by Brendan Berney in 2010.
  • jlibewf, native Java EWF reader contributed by Bruce Allen in 2010.

A menu based interface for ewfacquirestream called pyEWF, contributed by Dennis Schreiber, was originally also available on the uitwisselplatform project site. However this is currently no longer maintained and was not moved to the sourceforge project size. The uitwisselplatform no longer exists. The name pyewf was reused for the libewf Python bindings created by David Collett which is now included in the libewf package.

Examples

Imaging a device on a Unix-based system:

ewfacquire /dev/sda

Imaging a device on a Windows system:

ewfacquire \\.\PhysicalDrive0

Converting a split RAW into an EWF image

ewfacquire split.raw.???

or

cat split.raw.??? | ewfacquirestream

Converting an optical disc (split) RAW into an EWF image (libewf 20110109 or later)

ewfacquire -T optical.cue optical.iso

Converting an EWF into another EWF format or a (split) RAW image

ewfexport image.E01

Exporting files from a logical image (L01)

ewfexport image.L01

FUSE mounting an EWF image (libewf 20110828 or later)

ewfmount image.E01 mount_point

FUSE mounting a logical image (L01) (libewf 20111016 or later)

ewfmount -f files image.L01 mount_point

History

Libewf was created by Joachim Metz in 2006, while working for Hoffmann Investigations.

Libewf is a rewrite of earlier work on the EnCase 4 file format by Michael Cohen part of PyFlag and the Expert Witness Compression Format Specification by Andrew Rosen. It has been updated to read and write EnCase version 1 to 7 .E01 files, EnCase 5 to 7 .L01 files, EnCase 7 .Ex01 and .Lx01 files and SMART .s01 files. Libewf has initiated an Extended EWF (EWF-X) specifications to bypass limitations on the format imposed by the EnCase .E01 format.

In 2007 David Loveall contributed mount_ewf.py to the libewf project. This application allows a fuse based mount of the storage media data in the EWF files to be mounted. Due to repeated issues with Python and the fuse Python-bindings on Mac OS X part of the functionality of these scripts has been rewritten into ewfmount.

External Links